%0 Journal Article %A Avis, Rafael %A Naulin, Raúl %T Asymptotic instability of nonlinear differential equations %J Electronic journal of differential equations %D 1997 %V 1997 %U http://geodesic.mathdoc.fr/item/EJDE_1997__1997__a35/ %G en %F EJDE_1997__1997__a35